Added fromLiteral implementation to the polyfill

Gulpfile.js

@@ -22,15 +22,14 @@ function compileSettings(entryPoint, fileName, languageOut) {
 }
 
 var flags = {
-  dependency_mode: 'STRICT',
+  dependency_mode: 'PRUNE',
   isolation_mode: 'IIFE',
   strict_mode_input: null,
   compilation_level: 'ADVANCED',
   language_in: 'ECMASCRIPT6_STRICT',
   jscomp_warning: [],
   jscomp_error: [
     "accessControls",
-    "ambiguousFunctionDecl",
     "checkDebuggerStatement",
     "checkPrototypalTypes",
     "checkRegExp",
@@ -43,16 +42,12 @@ var flags = {
     "deprecatedAnnotations",
     "duplicate",
     "duplicateMessage",
-    "es3",
     "es5Strict",
     "externsValidation",
-    "fileoverviewTags",
     "functionParams",
     "globalThis",
-    "internetExplorerChecks",
     "invalidCasts",
     "misplacedTypeAnnotation",
-    "missingGetCssName",
     "missingOverride",
     "missingPolyfill",
     "missingProperties",
@@ -62,24 +57,20 @@ var flags = {
 //  "missingSourcesWarnings", // Implies reportUnknownTypes.
     "moduleLoad",
     "msgDescriptions",
-    "newCheckTypes",
     "nonStandardJsDocs",
 //  "reportUnknownTypes", // Too many "could not determine the type of this expression" errors
     "strictCheckTypes",
     "strictMissingProperties",
-    "strictMissingRequire",
     "strictModuleDepCheck",
     "strictPrimitiveOperators",
     "suspiciousCode",
     "tooManyTypeParams",
     "typeInvalidation",
-    "undefinedNames",
     "undefinedVars",
     "underscore",
     "unknownDefines",
     "unusedLocalVariables",
     "unusedPrivateMembers",
-    "useOfGoogBase",
     "uselessCode",
     "visibility",
   ],